There are many things that make the wolf special, inside and out. Here are just a few.
Long legs and large lungs allow the wolf to run and go the distance. Wolves travel around 10- 30 miles a day in search of food. They usually go slow at a slow trot of about 5 miles per hour. When they see prey, they can run short bursts of up to 38 miles per hour. They don't run a lot, but with large lungs, wolves can travel for a very long time without getting tired.
The jaw bone of a wolf is very strong. It allows the wolf to bite down really hard on something and not let go. Their jaws have a biting capacity of 398 pounds of pressure per square inch. That's a big bite! The jaw bone of a wolf is so strong, it can crush bones!
The belly of a wolf is very important. The stomach is where all the food that the wolf eats goes. A wolf can eat 22.5 pounds of meat at one meal; that's like eating 3,538 cheeseburgers from McDonald's. That is one big feast! However, when there isn't a lot of food, the wolf can go 12 days and sometimes more without food. If their stomach wasn't that flexible, the wolf would surely die.